/Engine/Source/Runtime/Engine/Classes/GameFramework/LightWeightInstanceManager.h
Base class for interfaces for each handle.
class UActorInstanceHandleInterface : public [UObject](API\Runtime\CoreUObject\UObject\UObject)
FActorInstanceH...
Handle
ALightWeightIns...
Manager
A cached pointer to the manager associated with Handle so we don't need to find it every time.